GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Tahoe - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Control Valve Assembly Installation

    Object Number: 1235585 Size: SH

    Important: Install a lint-free cloth into the park pawl apply assembly guide hole to prevent the selector valve pin from falling into the transmission. Install a lint-free cloth (1) in the park pawl apply assembly guide hole in main housing (2).

  1. Position the main housing so that the valve body face of the main housing is facing up.

    2. Object Number: 1216931 Size: SH
  2. Align selector valve pin (3) with manual selector valve (2).
  3. Rotate the selector valve pin until the pin can be installed into the manual selector valve.
  4. Install selector valve pin (3) into manual selector valve (2).
  5. Install the manual selector valve into shift valve body (1).

    6. Object Number: 1216929 Size: SH

    Notice: Do not drop the manual valve when removing or installing the control valve assembly onto or from the transmission case.

  6. Align the control valve assembly with the main housing while installing selector valve pin (3) into detent lever (1).

    7. Object Number: 1216928 Size: SH
  7. Align two control valve assembly dowel pins (1) with the dowel pin holes in the main housing.
  8. Install control valve assembly (2) onto the main housing.

    9. Object Number: 1216923 Size: SH
  9. Remove lint free cloth (1) from the park pawl apply assembly guide hole.

    10. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1216920 Size: SH
  10. Install 15 control valve assembly bolts (1).

    11. Tighten
    Tighten the bolts to 12 N·m (108 lb  in).


    Object Number: 1216926 Size: SH
  11. Install detent spring assembly (2) onto main valve body (4).
  12. Make sure detent spring assembly (2) roller rests on detent lever (3).

    13. Notice: Refer to Fastener Notice in the Preface section.

  13. Install 2 detent spring assembly bolts (1).

    14. Tighten
    Tighten the bolts to 12 N·m (108 lb in).